1366 - Incorrect integer value: '' for column 'customer_id' at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'i8a04inifpl02crmt7gu3fs9b3', '54.145.83.79', '1539749407', '1539749407', '/catalog/product_info.php?products_id=899&osCsid=jfumef7n3mie0bcc1700v0poe0')

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